Soondar&reg; USB Charging Voltage and Current Dual Display Dual-USB Output Charging Detector, Digital LED Ammter Voltmeter Guage DC Display, One-input Dual-output, Data Communication Function, Red/Blue USB charging voltage and current dual display, One-input , Dual-output;Data communication function Simultaneously displaying of Amp and Volt in real-time Measuring Range: Voltage 3.0 ~ 10V Current 0 ~ 3A Accuracy: +/- 1% USB Output Port 1 is dedicated for both Data Sync and Battery Charging USB Output Port 2 has built-in circuit for Accelerated Large Current Fast Charging